Measurements of acoustic scattering from zooplankton and oceanic microstructure using a broadband echosounder


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dc.contributor.author Lavery, Andone C.
dc.contributor.author Chu, Dezhang
dc.contributor.author Moum, James N.
dc.date.accessioned 2009-11-04T14:19:49Z
dc.date.available 2009-11-04T14:19:49Z
dc.date.issued 2009-10-29
dc.identifier.citation ICES Journal of Marine Science: Journal du Conseil 67 (2010): 379-394 en_US
dc.identifier.uri http://hdl.handle.net/1912/3056
dc.description © 2009 The Authors. This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License. The definitive version was published in ICES Journal of Marine Science: Journal du Conseil 67 (2010): 379-394, doi:10.1093/icesjms/fsp242. en_US
dc.description.abstract In principle, measurements of high-frequency acoustic scattering from oceanic microstructure and zooplankton across a broad range of frequencies can reduce the ambiguities typically associated with the interpretation of acoustic scattering at a single frequency or a limited number of discrete narrowband frequencies. With this motivation, a high-frequency broadband scattering system has been developed for investigating zooplankton and microstructure, involving custom modifications of a commercially available system, with almost complete acoustic coverage spanning the frequency range 150–600 kHz. This frequency range spans the Rayleigh-to-geometric scattering transition for some zooplankton, as well as the diffusive roll-off in the spectrum for scattering from turbulent temperature microstructure. The system has been used to measure scattering from zooplankton and microstructure in regions of non-linear internal waves. The broadband capabilities of the system provide a continuous frequency response of the scattering over a wide frequency band, and improved range resolution and signal-to-noise ratios through pulse-compression signal-processing techniques. System specifications and calibration procedures are outlined and the system performance is assessed. The results point to the utility of high-frequency broadband scattering techniques in the detection, classification, and under certain circumstances, quantification of zooplankton and microstructure. en_US
dc.description.sponsorship The work was supported by the US Office of Naval Research (Grant # N000140210359). en_US
dc.format.mimetype application/pdf
dc.language.iso en en_US
dc.publisher Oxford University Press en_US
dc.relation.uri http://dx.doi.org/10.1093/icesjms/fsp242
dc.rights.uri http://creativecommons.org/licenses/by-nc/2.5/uk/ *
dc.subject Broadband acoustic scattering en_US
dc.subject Internal waves en_US
dc.subject Oceanic microstructure en_US
dc.subject Zooplankton en_US
dc.title Measurements of acoustic scattering from zooplankton and oceanic microstructure using a broadband echosounder en_US
dc.type Article en_US
dc.identifier.doi 10.1093/icesjms/fsp242

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